The plate of Red Star ale yeast I plated 10 days ago still has few
bacterial colonies (up to 7 out of 1000 now), but it is covered with
evil-looking _molds_, about a dozen Penicillium-like ones (white and
blue and fluffy), and an absolutely disgusting slimy brownish one. This
plate looks worse than any that I have ever seen!

The pure colonies on the other hand continue to grow nicely, and have
not given rise to any petite mutants after two restreakings.